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Bangkok, 1975. Dutch diplomat Herman Knippenberg investigates the disappearance of a young couple who were last seen alive at the apartment of gem dealer Charles Sobhraj.

Marie-Andrée Leclerc leaves her life behind for the love of Charles Sobhraj but discovers the chilling cost. Herman vows to investigate the murders of the Dutch couple.

Young Frenchman Dominique Renelleau tries to escape Charles Sobhraj’s terrifying lair. As he listens to Nadine and Remi’s testimony, Herman realises the scale of Charles’s crimes.

Charles embarks on a terrifying trail of destruction in Nepal, while Nadine helps Herman gather the final evidence he needs for the police to act.

Herman and Charles engage in an exhausting battle of wits as Herman continues to pile pressure on the Thai police to prosecute the suspects, while Charles perfects his escape plan.

The fallout from Gautier’s escape threatens Herman’s diplomatic career. Charles attempts to set up business in France, a place that holds powerful memories for him.

Charles and Marie-Andrée arrive in Paris and attempt to set up a new life. Meanwhile, Herman makes a dangerous gamble in his investigation which finally brings a breakthrough.

The net begins to close around Charles and Marie-Andrée in India, but the final chapter of Herman’s pursuit of Sobhraj stretches long into the future.